1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ebdf837de49a9cc340c95d04b78f53bec0b4e8c70030aa703acff343c0dd15. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd7c7402-3f96-462d-8445-1a3bda1ca561.json and https://artists.proofprofile.net/proofs/artist/dd7c7402-3f96-462d-8445-1a3bda1ca561.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6cbf1301f7bb39a9cf8d569dbbe596c023ff4fa4409023136774917f670770. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c42009e6990387b0b9eddd5f5e3223c50dcf4d665e0638156e69089fc3f32ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6436ff683dde9a8515965abfe1f4ecbd25f0a8add53d23188083ccfc1966422a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ef71628c70d291b7684999478632ff30bc2365ae469b73996cc333399197d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a715f9ad70b60cee846ae261844a8562c6bcaf1ad7c0e849d6f1e39cfd83d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3855322c598a0f53e02e9e10e8547d9060a76379bbd19de74424ac3bcdf1540. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd143c5e4b69258a2633e847b2b30f9fe116e52ace5311af9c16be44e0429ac0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2289124a61e9a7a3e0492c1d6979b99fefd3e2ae949c99dc962899a5a82ccd4a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd042b1c388b6148bb2aad7607ec60c365dbe45ef08390bb73906fb903ab3cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ca5c4758724ea62dea9f57ba84921d95c09be39a31e0212f9319be6fa38aea. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526f0aac872fc662cc90439fe815bdbe72b9cc001aa47a210c2c30df7289d4e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e79d026a0cb91acfbadfb34eb9ff7c38e8eaa8e50533a171ef8b8694f31bdc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7b3549f983ccf011aa0d1b78587d721da78d640551904767a9174aabd13a53. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e90be6c019b2adf2963a96ce3db2a0f464ab27e55c813401058cdf314f6eac5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a4db627b9963cb6a4d1b4c91a56ee8c72d345fa284f30c7ef44ee859be2ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f90bf31c45c5d4faf24a9d99f9745fa901e246bf740c2e3edf2b981dce319a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ceb71c9a99812f0d0ba85aa82778becd56646c59e26ee5fd827b73ddf7da20. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57e1a06879123d7027fdfed4d8da4c7a848e13dacd1c61e8d4036de98b4dd75. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200122.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace165d79c798aa91e36113c72a804e6f9dc8261254f5b852edd733569554c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1411edad7bbcf7edf8e0ba31883a8601ff90fab19d33577911c6bf900670d869. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16184ddd31526607b330461b36caebcf9b2d7f1657172e0e569f5716eb8e79b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa527a5f911efd62e08500922db029893aa242a9c92519fc2c29f298bb0bd8e88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439ea976b6637dc50c032b87dbc2a47b3663c161b71c84a984d4330757cab480. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c97e7bc0b48feaf0343995ffde446b86b1caea9e4011949b59284016ed351. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb3a059ca4e532dabe7b16d5a23097b9332df000f3364fec524a13ac8405e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c36e29f9735b30bf2fefb6517a15fa41538d4538976d3a7353c80fa333c3f45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df25ae290955292205db7cfccbcd07cfcf20efd6b40b68e8ee8647134dc4a44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c965cae762e6216e751a61c2dbdab1348c5fa23482d3abde572039383cc9c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d24dd65b15aa40ee8b39e52b267656ee6faf59a7234ffc504442f2d86b317d6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e96457ae3a325e204750892dcb6a55e7a9000da097f7433c88dcdc5374c7860. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ca668d23d4e8d772cf7c81ea9beaa6d29aebd02855ed9d4c72909151f6f65. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3c99c17a6b38070aa41efdfa8b2cf837c502e53e6996044d22449bbb1dc14e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1200121.